Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Condensed Consolidated Balance Sheets [Abstract]
Redeemable preferred stock, par value	$ 0.0001	$ 0.0001
Redeemable preferred stock, shares authorized	20,000	20,000
Redeemable preferred stock, shares issued	3,319	3,319
Redeemable preferred stock, shares outstanding	3,319	3,319
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	200,000	200,000
Common stock, shares issued	89,599	89,362
Common stock, shares outstanding	89,599	89,362
Treasury stock, shares	19	19